One pot synthesis of nickel foam supported self-assembly of NiWO4 and CoWO4 nanostructures that act as high performance electrochemical capacitor electrodes

Guanjie He, Jianmin Li, Wenyao Li, Bo Li, Nuruzzaman Noor, Kaibing Xu, Junqing Hu, Ivan P. Parkin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

In this work, we report a facile one-step hydrothermal approach to synthesize NiWO4 and CoWO4 nanostructures on nickel foam as binder-free electrodes for use as supercapacitors. The as-synthesized materials showed excellent electrochemical performance, with a high specific capacitance of 797.8 F g-1 and 764.4 F g-1 at a current density of 1 A g-1 after 3000 cycles. On increasing the current density by 20 times, the rate capabilities still maintained 55.6% and 50.6% of the original value for NiWO4/Ni foam and CoWO4/Ni foam, respectively. Moreover, both of these materials exhibited outstanding cycling stability, the 6000th cycle at 50 mV s-1 demonstrated 2.06 and 2.81 times better capacitance than the initial cycles for NiWO4/Ni foam and CoWO4/Ni foam, respectively. To our knowledge, this capacitance performance is better than any previously reported value for these materials and is a consequence of the highly evolved surface area/microstructure of the materials formed by this technique.
Original languageEnglish
Pages (from-to)14272-14278
Number of pages7
JournalJournal of Materials Chemistry A
Volume3
Issue number27
DOIs
Publication statusPublished - 21 Jul 2015
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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